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# AccessibilityService

`public abstract class AccessibilityService`
`` `` `` `extends Service` ``

java.lang.Object
↳ | android.content.Context
| ↳ | android.content.ContextWrapper
|  | ↳ | android.app.Service
|  |  | ↳ | android.accessibilityservice.AccessibilityService

Accessibility services should only be used to assist users with disabilities in using Android devices and apps. They run in the background and receive callbacks by the system when `AccessibilityEvent`s are fired. Such events denote some state transition in the user interface, for example, the focus has changed, a button has been clicked, etc. Such a service can optionally request the capability for querying the content of the active window. Development of an accessibility service requires extending this class and implementing its abstract methods.

### Developer Guides

For more information about creating AccessibilityServices, read the Accessibility developer guide.

### Lifecycle

The lifecycle of an accessibility service is managed exclusively by the system and follows the established service life cycle. Starting an accessibility service is triggered exclusively by the user explicitly turning the service on in device settings. After the system binds to a service, it calls `AccessibilityService#onServiceConnected()`. This method can be overridden by clients that want to perform post binding setup.

An accessibility service stops either when the user turns it off in device settings or when it calls `AccessibilityService#disableSelf()`.

### Declaration

An accessibility is declared as any other service in an AndroidManifest.xml, but it must do two things:

Specify that it handles the "android.accessibilityservice.AccessibilityService" `Intent`.

Request the `Manifest.permission.BIND_ACCESSIBILITY_SERVICE` permission to ensure that only the system can bind to it.

If either of these items is missing, the system will ignore the accessibility service. Following is an example declaration:

     <service android:name=".MyAccessibilityService"
             android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
         <intent-filter>
             <action android:name="android.accessibilityservice.AccessibilityService" />
         </intent-filter>
         . . .
     </service>

### Configuration

An accessibility service can be configured to receive specific types of accessibility events, listen only to specific packages, get events from each type only once in a given time frame, retrieve window content, specify a settings activity, etc.

There are two approaches for configuring an accessibility service:

- Providing a `meta-data` entry in the manifest when declaring the service. A service declaration with a meta-data tag is presented below:

       <service android:name=".MyAccessibilityService">
           <intent-filter>
               <action android:name="android.accessibilityservice.AccessibilityService" />
           </intent-filter>
           <meta-data android:name="android.accessibilityservice" android:resource="@xml/accessibilityservice" />
       </service>

  Note: This approach enables setting all properties.

  For more details refer to `SERVICE_META_DATA` and `<`accessibility-service`>`.

- Calling `AccessibilityService#setServiceInfo(AccessibilityServiceInfo)`. Note that this method can be called any time to dynamically change the service configuration.

  Note: This approach enables setting only dynamically configurable properties: `AccessibilityServiceInfo#eventTypes`, `AccessibilityServiceInfo#feedbackType`, `AccessibilityServiceInfo#flags`, `AccessibilityServiceInfo#notificationTimeout`, `AccessibilityServiceInfo#packageNames`

  For more details refer to `AccessibilityServiceInfo`.

### Retrieving window content

A service can specify in its declaration that it can retrieve window content which is represented as a tree of `AccessibilityWindowInfo` and `AccessibilityNodeInfo` objects. Note that declaring this capability requires that the service declares its configuration via an XML resource referenced by `SERVICE_META_DATA`.

Window content may be retrieved with `AccessibilityEvent#getSource()`, `AccessibilityService#findFocus(int)`, `AccessibilityService#getWindows()`, or `AccessibilityService#getRootInActiveWindow()`.

Note An accessibility service may have requested to be notified for a subset of the event types, and thus be unaware when the node hierarchy has changed. It is also possible for a node to contain outdated information because the window content may change at any time.

### Notification strategy

All accessibility services are notified of all events they have requested, regardless of their feedback type.

Note: The event notification timeout is useful to avoid propagating events to the client too frequently since this is accomplished via an expensive interprocess call. One can think of the timeout as a criteria to determine when event generation has settled down.

### Event types

- `AccessibilityEvent#TYPE_VIEW_CLICKED`
- `AccessibilityEvent#TYPE_VIEW_LONG_CLICKED`
- `AccessibilityEvent#TYPE_VIEW_FOCUSED`
- `AccessibilityEvent#TYPE_VIEW_SELECTED`
- `AccessibilityEvent#TYPE_VIEW_TEXT_CHANGED`
- `AccessibilityEvent#TYPE_WINDOW_STATE_CHANGED`
- `AccessibilityEvent#TYPE_NOTIFICATION_STATE_CHANGED`
- `AccessibilityEvent#TYPE_TOUCH_EXPLORATION_GESTURE_START`
- `AccessibilityEvent#TYPE_TOUCH_EXPLORATION_GESTURE_END`
- `AccessibilityEvent#TYPE_VIEW_HOVER_ENTER`
- `AccessibilityEvent#TYPE_VIEW_HOVER_EXIT`
- `AccessibilityEvent#TYPE_VIEW_SCROLLED`
- `AccessibilityEvent#TYPE_VIEW_TEXT_SELECTION_CHANGED`
- `AccessibilityEvent#TYPE_WINDOW_CONTENT_CHANGED`
- `AccessibilityEvent#TYPE_ANNOUNCEMENT`
- `AccessibilityEvent#TYPE_GESTURE_DETECTION_START`
- `AccessibilityEvent#TYPE_GESTURE_DETECTION_END`
- `AccessibilityEvent#TYPE_TOUCH_INTERACTION_START`
- `AccessibilityEvent#TYPE_TOUCH_INTERACTION_END`
- `AccessibilityEvent#TYPE_VIEW_ACCESSIBILITY_FOCUSED`
- `AccessibilityEvent#TYPE_WINDOWS_CHANGED`
- `AccessibilityEvent#TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED`

### Feedback types

- `AccessibilityServiceInfo#FEEDBACK_AUDIBLE`
- `AccessibilityServiceInfo#FEEDBACK_HAPTIC`
- `AccessibilityServiceInfo#FEEDBACK_AUDIBLE`
- `AccessibilityServiceInfo#FEEDBACK_VISUAL`
- `AccessibilityServiceInfo#FEEDBACK_GENERIC`
- `AccessibilityServiceInfo#FEEDBACK_BRAILLE`

See also:

- `AccessibilityEvent`
- `AccessibilityServiceInfo`
- `AccessibilityManager`

## Summary

### Nested classes
`class` | `AccessibilityService.GestureResultCallback` Class used to report status of dispatched gestures
`class` | `AccessibilityService.MagnificationController` Used to control and query the state of display magnification.
`class` | `AccessibilityService.ScreenshotResult` Can be used to construct a bitmap of the screenshot or any other operations for `AccessibilityService#takeScreenshot` API.
`class` | `AccessibilityService.SoftKeyboardController` Used to control, query, and listen for changes to the soft keyboard show mode.
`interface` | `AccessibilityService.TakeScreenshotCallback` Interface used to report status of taking screenshot.

### Constants
`int` | `ERROR_TAKE_SCREENSHOT_INTERNAL_ERROR` The status of taking screenshot is failure and the reason is internal error.
`int` | `ERROR_TAKE_SCREENSHOT_INTERVAL_TIME_SHORT` The status of taking screenshot is failure and the reason is that too little time has elapsed since the last screenshot.
`int` | `ERROR_TAKE_SCREENSHOT_INVALID_DISPLAY` The status of taking screenshot is failure and the reason is invalid display Id.
`int` | `ERROR_TAKE_SCREENSHOT_NO_ACCESSIBILITY_ACCESS` The status of taking screenshot is failure and the reason is no accessibility access.
`int` | `GESTURE_2_FINGER_DOUBLE_TAP` The user has performed a two-finger double tap gesture on the touch screen.
`int` | `GESTURE_2_FINGER_DOUBLE_TAP_AND_HOLD` The user has performed a two-finger double tap and hold gesture on the touch screen.
`int` | `GESTURE_2_FINGER_SINGLE_TAP` The user has performed a two-finger single tap gesture on the touch screen.
`int` | `GESTURE_2_FINGER_SWIPE_DOWN` The user has performed a two-finger swipe down gesture on the touch screen.
`int` | `GESTURE_2_FINGER_SWIPE_LEFT` The user has performed a two-finger swipe left gesture on the touch screen.
`int` | `GESTURE_2_FINGER_SWIPE_RIGHT` The user has performed a two-finger swipe right gesture on the touch screen.
`int` | `GESTURE_2_FINGER_SWIPE_UP` The user has performed a two-finger swipe up gesture on the touch screen.
`int` | `GESTURE_2_FINGER_TRIPLE_TAP` The user has performed a two-finger triple tap gesture on the touch screen.
`int` | `GESTURE_3_FINGER_DOUBLE_TAP` The user has performed a three-finger double tap gesture on the touch screen.
`int` | `GESTURE_3_FINGER_DOUBLE_TAP_AND_HOLD` The user has performed a three-finger double tap and hold gesture on the touch screen.
`int` | `GESTURE_3_FINGER_SINGLE_TAP` The user has performed a three-finger single tap gesture on the touch screen.
`int` | `GESTURE_3_FINGER_SWIPE_DOWN` The user has performed a three-finger swipe down gesture on the touch screen.
`int` | `GESTURE_3_FINGER_SWIPE_LEFT` The user has performed a three-finger swipe left gesture on the touch screen.
`int` | `GESTURE_3_FINGER_SWIPE_RIGHT` The user has performed a three-finger swipe right gesture on the touch screen.
`int` | `GESTURE_3_FINGER_SWIPE_UP` The user has performed a three-finger swipe up gesture on the touch screen.
`int` | `GESTURE_3_FINGER_TRIPLE_TAP` The user has performed a three-finger triple tap gesture on the touch screen.
`int` | `GESTURE_4_FINGER_DOUBLE_TAP` The user has performed a four-finger double tap gesture on the touch screen.
`int` | `GESTURE_4_FINGER_DOUBLE_TAP_AND_HOLD` The user has performed a two-finger double tap and hold gesture on the touch screen.
`int` | `GESTURE_4_FINGER_SINGLE_TAP` The user has performed a four-finger single tap gesture on the touch screen.
`int` | `GESTURE_4_FINGER_SWIPE_DOWN` The user has performed a four-finger swipe down gesture on the touch screen.
`int` | `GESTURE_4_FINGER_SWIPE_LEFT` The user has performed a four-finger swipe left gesture on the touch screen.
`int` | `GESTURE_4_FINGER_SWIPE_RIGHT` The user has performed a four-finger swipe right gesture on the touch screen.
`int` | `GESTURE_4_FINGER_SWIPE_UP` The user has performed a four-finger swipe up gesture on the touch screen.
`int` | `GESTURE_4_FINGER_TRIPLE_TAP` The user has performed a four-finger triple tap gesture on the touch screen.
`int` | `GESTURE_DOUBLE_TAP` The user has performed a double tap gesture on the touch screen.
`int` | `GESTURE_DOUBLE_TAP_AND_HOLD` The user has performed a double tap and hold gesture on the touch screen.
`int` | `GESTURE_SWIPE_DOWN` The user has performed a swipe down gesture on the touch screen.
`int` | `GESTURE_SWIPE_DOWN_AND_LEFT` The user has performed an down and left gesture on the touch screen.
`int` | `GESTURE_SWIPE_DOWN_AND_RIGHT` The user has performed an down and right gesture on the touch screen.
`int` | `GESTURE_SWIPE_DOWN_AND_UP` The user has performed a swipe down and up gesture on the touch screen.
`int` | `GESTURE_SWIPE_LEFT` The user has performed a swipe left gesture on the touch screen.
`int` | `GESTURE_SWIPE_LEFT_AND_DOWN` The user has performed a left and down gesture on the touch screen.
`int` | `GESTURE_SWIPE_LEFT_AND_RIGHT` The user has performed a swipe left and right gesture on the touch screen.
`int` | `GESTURE_SWIPE_LEFT_AND_UP` The user has performed a left and up gesture on the touch screen.
`int` | `GESTURE_SWIPE_RIGHT` The user has performed a swipe right gesture on the touch screen.
`int` | `GESTURE_SWIPE_RIGHT_AND_DOWN` The user has performed a right and down gesture on the touch screen.
`int` | `GESTURE_SWIPE_RIGHT_AND_LEFT` The user has performed a swipe right and left gesture on the touch screen.
`int` | `GESTURE_SWIPE_RIGHT_AND_UP` The user has performed a right and up gesture on the touch screen.
`int` | `GESTURE_SWIPE_UP` The user has performed a swipe up gesture on the touch screen.
`int` | `GESTURE_SWIPE_UP_AND_DOWN` The user has performed a swipe up and down gesture on the touch screen.
`int` | `GESTURE_SWIPE_UP_AND_LEFT` The user has performed an up and left gesture on the touch screen.
`int` | `GESTURE_SWIPE_UP_AND_RIGHT` The user has performed an up and right gesture on the touch screen.
`int` | `GLOBAL_ACTION_BACK` Action to go back.
`int` | `GLOBAL_ACTION_HOME` Action to go home.
`int` | `GLOBAL_ACTION_LOCK_SCREEN` Action to lock the screen
`int` | `GLOBAL_ACTION_NOTIFICATIONS` Action to open the notifications.
`int` | `GLOBAL_ACTION_POWER_DIALOG` Action to open the power long-press dialog.
`int` | `GLOBAL_ACTION_QUICK_SETTINGS` Action to open the quick settings.
`int` | `GLOBAL_ACTION_RECENTS` Action to toggle showing the overview of recent apps.
`int` | `GLOBAL_ACTION_TAKE_SCREENSHOT` Action to take a screenshot
`int` | `GLOBAL_ACTION_TOGGLE_SPLIT_SCREEN` Action to toggle docking the current app's window
`String` | `SERVICE_INTERFACE` The `Intent` that must be declared as handled by the service.
`String` | `SERVICE_META_DATA` Name under which an AccessibilityService component publishes information about itself.
`int` | `SHOW_MODE_AUTO` Allow the system to control when the soft keyboard is shown.
`int` | `SHOW_MODE_HIDDEN` Never show the soft keyboard.
`int` | `SHOW_MODE_IGNORE_HARD_KEYBOARD` Allow the soft keyboard to be shown, even if a hard keyboard is connected

### Inherited constants
From class `android.app.Service`
`int` | `START_CONTINUATION_MASK` Bits returned by `onStartCommand(Intent, int, int)` describing how to continue the service if it is killed.
`int` | `START_FLAG_REDELIVERY` This flag is set in `onStartCommand(Intent, int, int)` if the Intent is a re-delivery of a previously delivered intent, because the service had previously returned `START_REDELIVER_INTENT` but had been killed before calling `stopSelf(int)` for that Intent.
`int` | `START_FLAG_RETRY` This flag is set in `onStartCommand(Intent, int, int)` if the Intent is a retry because the original attempt never got to or returned from `onStartCommand(android.content.Intent, int, int)`.
`int` | `START_NOT_STICKY` Constant to return from `onStartCommand(Intent, int, int)`: if this service's process is killed while it is started (after returning from `onStartCommand(Intent, int, int)`), and there are no new start intents to deliver to it, then take the service out of the started state and don't recreate until a future explicit call to `Context#startService`.
`int` | `START_REDELIVER_INTENT` Constant to return from `onStartCommand(Intent, int, int)`: if this service's process is killed while it is started (after returning from `onStartCommand(Intent, int, int)`), then it will be scheduled for a restart and the last delivered Intent re-delivered to it again via `onStartCommand(Intent, int, int)`.
`int` | `START_STICKY` Constant to return from `onStartCommand(Intent, int, int)`: if this service's process is killed while it is started (after returning from `onStartCommand(Intent, int, int)`), then leave it in the started state but don't retain this delivered intent.
`int` | `START_STICKY_COMPATIBILITY` Constant to return from `onStartCommand(Intent, int, int)`: compatibility version of `START_STICKY` that does not guarantee that `onStartCommand(Intent, int, int)` will be called again after being killed.
`int` | `STOP_FOREGROUND_DETACH` Flag for `stopForeground(int)`: if set, the notification previously provided to `startForeground(int, Notification)` will be detached from the service.
`int` | `STOP_FOREGROUND_REMOVE` Flag for `stopForeground(int)`: if set, the notification previously provided to `startForeground(int, Notification)` will be removed.
From class `android.content.Context`
`String` | `ACCESSIBILITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AccessibilityManager` for giving the user feedback for UI events through the registered event listeners.
`String` | `ACCOUNT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AccountManager` for receiving intents at a time of your choosing.
`String` | `ACTIVITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ActivityManager` for interacting with the global system state.
`String` | `ALARM_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AlarmManager` for receiving intents at a time of your choosing.
`String` | `APPWIDGET_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AppWidgetManager` for accessing AppWidgets.
`String` | `APP_OPS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AppOpsManager` for tracking application operations on the device.
`String` | `AUDIO_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AudioManager` for handling management of volume, ringer modes and audio routing.
`String` | `BATTERY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `BatteryManager` for managing battery state.
`int` | `BIND_ABOVE_CLIENT` Flag for `bindService(Intent, ServiceConnection, int)`: indicates that the client application binding to this service considers the service to be more important than the app itself.
`int` | `BIND_ADJUST_WITH_ACTIVITY` Flag for `bindService(Intent, ServiceConnection, int)`: If binding from an activity, allow the target service's process importance to be raised based on whether the activity is visible to the user, regardless whether another flag is used to reduce the amount that the client process's overall importance is used to impact it.
`int` | `BIND_ALLOW_OOM_MANAGEMENT` Flag for `bindService(Intent, ServiceConnection, int)`: allow the process hosting the bound service to go through its normal memory management.
`int` | `BIND_AUTO_CREATE` Flag for `bindService(Intent, ServiceConnection, int)`: automatically create the service as long as the binding exists.
`int` | `BIND_DEBUG_UNBIND` Flag for `bindService(Intent, ServiceConnection, int)`: include debugging help for mismatched calls to unbind.
`int` | `BIND_EXTERNAL_SERVICE` Flag for `bindService(Intent, ServiceConnection, int)`: The service being bound is an `isolated`, `external` service.
`int` | `BIND_IMPORTANT` Flag for `bindService(Intent, ServiceConnection, int)`: this service is very important to the client, so should be brought to the foreground process level when the client is.
`int` | `BIND_INCLUDE_CAPABILITIES` Flag for `bindService(Intent, ServiceConnection, int)`: If binding from an app that has specific capabilities due to its foreground state such as an activity or foreground service, then this flag will allow the bound app to get the same capabilities, as long as it has the required permissions as well.
`int` | `BIND_NOT_FOREGROUND` Flag for `bindService(Intent, ServiceConnection, int)`: don't allow this binding to raise the target service's process to the foreground scheduling priority.
`int` | `BIND_NOT_PERCEPTIBLE` Flag for `bindService(Intent, ServiceConnection, int)`: If binding from an app that is visible or user-perceptible, lower the target service's importance to below the perceptible level.
`int` | `BIND_WAIVE_PRIORITY` Flag for `bindService(Intent, ServiceConnection, int)`: don't impact the scheduling or memory management priority of the target service's hosting process.
`String` | `BIOMETRIC_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `BiometricManager` for handling biometric and PIN/pattern/password authentication.
`String` | `BLOB_STORE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `BlobStoreManager` for contributing and accessing data blobs from the blob store maintained by the system.
`String` | `BLUETOOTH_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `BluetoothManager` for using Bluetooth.
`String` | `CAMERA_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `CameraManager` for interacting with camera devices.
`String` | `CAPTIONING_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `CaptioningManager` for obtaining captioning properties and listening for changes in captioning preferences.
`String` | `CARRIER_CONFIG_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `CarrierConfigManager` for reading carrier configuration values.
`String` | `CLIPBOARD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ClipboardManager` for accessing and modifying the contents of the global clipboard.
`String` | `COMPANION_DEVICE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `CompanionDeviceManager` for managing companion devices
`String` | `CONNECTIVITY_DIAGNOSTICS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ConnectivityDiagnosticsManager` for performing network connectivity diagnostics as well as receiving network connectivity information from the system.
`String` | `CONNECTIVITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ConnectivityManager` for handling management of network connections.
`String` | `CONSUMER_IR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ConsumerIrManager` for transmitting infrared signals from the device.
`int` | `CONTEXT_IGNORE_SECURITY` Flag for use with `createPackageContext(String, int)`: ignore any security restrictions on the Context being requested, allowing it to always be loaded.
`int` | `CONTEXT_INCLUDE_CODE` Flag for use with `createPackageContext(String, int)`: include the application code with the context.
`int` | `CONTEXT_RESTRICTED` Flag for use with `createPackageContext(String, int)`: a restricted context may disable specific features.
`String` | `CROSS_PROFILE_APPS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `CrossProfileApps` for cross profile operations.
`String` | `DEVICE_POLICY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `DevicePolicyManager` for working with global device policy management.
`String` | `DISPLAY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `DisplayManager` for interacting with display devices.
`String` | `DOWNLOAD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `DownloadManager` for requesting HTTP downloads.
`String` | `DROPBOX_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `DropBoxManager` instance for recording diagnostic logs.
`String` | `EUICC_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `EuiccManager` to manage the device eUICC (embedded SIM).
`String` | `FILE_INTEGRITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve an `FileIntegrityManager`.
`String` | `FINGERPRINT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `FingerprintManager` for handling management of fingerprints.
`String` | `HARDWARE_PROPERTIES_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `HardwarePropertiesManager` for accessing the hardware properties service.
`String` | `INPUT_METHOD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `InputMethodManager` for accessing input methods.
`String` | `INPUT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `InputManager` for interacting with input devices.
`String` | `IPSEC_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `IpSecManager` for encrypting Sockets or Networks with IPSec.
`String` | `JOB_SCHEDULER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `JobScheduler` instance for managing occasional background tasks.
`String` | `KEYGUARD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `KeyguardManager` for controlling keyguard.
`String` | `LAUNCHER_APPS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `LauncherApps` for querying and monitoring launchable apps across profiles of a user.
`String` | `LAYOUT_INFLATER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `LayoutInflater` for inflating layout resources in this context.
`String` | `LOCATION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `LocationManager` for controlling location updates.
`String` | `MEDIA_PROJECTION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `MediaProjectionManager` instance for managing media projection sessions.
`String` | `MEDIA_ROUTER_SERVICE` Use with `getSystemService(Class)` to retrieve a `MediaRouter` for controlling and managing routing of media.
`String` | `MEDIA_SESSION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `MediaSessionManager` for managing media Sessions.
`String` | `MIDI_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `MidiManager` for accessing the MIDI service.
`int` | `MODE_APPEND` File creation mode: for use with `openFileOutput(String, int)`, if the file already exists then write data to the end of the existing file instead of erasing it.
`int` | `MODE_ENABLE_WRITE_AHEAD_LOGGING` Database open flag: when set, the database is opened with write-ahead logging enabled by default.
`int` | `MODE_MULTI_PROCESS` This constant is deprecated. MODE_MULTI_PROCESS does not work reliably in some versions of Android, and furthermore does not provide any mechanism for reconciling concurrent modifications across processes. Applications should not attempt to use it. Instead, they should use an explicit cross-process data management approach such as `ContentProvider`.
`int` | `MODE_NO_LOCALIZED_COLLATORS` Database open flag: when set, the database is opened without support for localized collators.
`int` | `MODE_PRIVATE` File creation mode: the default mode, where the created file can only be accessed by the calling application (or all applications sharing the same user ID).
`int` | `MODE_WORLD_READABLE` This constant is deprecated. Creating world-readable files is very dangerous, and likely to cause security holes in applications. It is strongly discouraged; instead, applications should use more formal mechanism for interactions such as `ContentProvider`, `BroadcastReceiver`, and `Service`. There are no guarantees that this access mode will remain on a file, such as when it goes through a backup and restore.
`int` | `MODE_WORLD_WRITEABLE` This constant is deprecated. Creating world-writable files is very dangerous, and likely to cause security holes in applications. It is strongly discouraged; instead, applications should use more formal mechanism for interactions such as `ContentProvider`, `BroadcastReceiver`, and `Service`. There are no guarantees that this access mode will remain on a file, such as when it goes through a backup and restore.
`String` | `NETWORK_STATS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NetworkStatsManager` for querying network usage stats.
`String` | `NFC_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NfcManager` for using NFC.
`String` | `NOTIFICATION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NotificationManager` for informing the user of background events.
`String` | `NSD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NsdManager` for handling management of network service discovery
`String` | `POWER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `PowerManager` for controlling power management, including "wake locks," which let you keep the device on while you're running long tasks.
`String` | `PRINT_SERVICE` `PrintManager` for printing and managing printers and print tasks.
`int` | `RECEIVER_VISIBLE_TO_INSTANT_APPS` Flag for `registerReceiver(BroadcastReceiver, IntentFilter)`: The receiver can receive broadcasts from Instant Apps.
`String` | `RESTRICTIONS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `RestrictionsManager` for retrieving application restrictions and requesting permissions for restricted operations.
`String` | `ROLE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `RoleManager` for managing roles.
`String` | `SEARCH_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SearchManager` for handling searches.
`String` | `SENSOR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SensorManager` for accessing sensors.
`String` | `SHORTCUT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ShortcutManager` for accessing the launcher shortcut service.
`String` | `STORAGE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `StorageManager` for accessing system storage functions.
`String` | `STORAGE_STATS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `StorageStatsManager` for accessing system storage statistics.
`String` | `SYSTEM_HEALTH_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SystemHealthManager` for accessing system health (battery, power, memory, etc) metrics.
`String` | `TELECOM_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TelecomManager` to manage telecom-related features of the device.
`String` | `TELEPHONY_IMS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve an `ImsManager`.
`String` | `TELEPHONY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TelephonyManager` for handling management the telephony features of the device.
`String` | `TELEPHONY_SUBSCRIPTION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SubscriptionManager` for handling management the telephony subscriptions of the device.
`String` | `TEXT_CLASSIFICATION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TextClassificationManager` for text classification services.
`String` | `TEXT_SERVICES_MANAGER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TextServicesManager` for accessing text services.
`String` | `TV_INPUT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TvInputManager` for interacting with TV inputs on the device.
`String` | `UI_MODE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `UiModeManager` for controlling UI modes.
`String` | `USAGE_STATS_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `UsageStatsManager` for querying device usage stats.
`String` | `USB_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `UsbManager` for access to USB devices (as a USB host) and for controlling this device's behavior as a USB device.
`String` | `USER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `UserManager` for managing users on devices that support multiple users.
`String` | `VIBRATOR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `Vibrator` for interacting with the vibration hardware.
`String` | `VPN_MANAGEMENT_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `VpnManager` to manage profiles for the platform built-in VPN.
`String` | `WALLPAPER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a com.android.server.WallpaperService for accessing wallpapers.
`String` | `WIFI_AWARE_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WifiAwareManager` for handling management of Wi-Fi Aware.
`String` | `WIFI_P2P_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WifiP2pManager` for handling management of Wi-Fi peer-to-peer connections.
`String` | `WIFI_RTT_RANGING_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WifiRttManager` for ranging devices with wifi.
`String` | `WIFI_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WifiManager` for handling management of Wi-Fi access.
`String` | `WINDOW_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WindowManager` for accessing the system's window manager.
From interface `android.content.ComponentCallbacks2`
`int` | `TRIM_MEMORY_BACKGROUND` Level for `onTrimMemory(int)`: the process has gone on to the LRU list.
`int` | `TRIM_MEMORY_COMPLETE` Level for `onTrimMemory(int)`: the process is nearing the end of the background LRU list, and if more memory isn't found soon it will be killed.
`int` | `TRIM_MEMORY_MODERATE` Level for `onTrimMemory(int)`: the process is around the middle of the background LRU list; freeing memory can help the system keep other processes running later in the list for better overall performance.
`int` | `TRIM_MEMORY_RUNNING_CRITICAL` Level for `onTrimMemory(int)`: the process is not an expendable background process, but the device is running extremely low on memory and is about to not be able to keep any background processes running.
`int` | `TRIM_MEMORY_RUNNING_LOW` Level for `onTrimMemory(int)`: the process is not an expendable background process, but the device is running low on memory.
`int` | `TRIM_MEMORY_RUNNING_MODERATE` Level for `onTrimMemory(int)`: the process is not an expendable background process, but the device is running moderately low on memory.
`int` | `TRIM_MEMORY_UI_HIDDEN` Level for `onTrimMemory(int)`: the process had been showing a user interface, and is no longer doing so.

### Public constructors
`AccessibilityService()`

### Public methods
`Context` | `createDisplayContext(Display display)` Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display.
`final void` | `disableSelf()` Disables the service.
`final boolean` | `dispatchGesture(GestureDescription gesture, AccessibilityService.GestureResultCallback callback, Handler handler)` Dispatch a gesture to the touch screen.
`AccessibilityNodeInfo` | `findFocus(int focus)` Find the view that has the specified focus type.
`final AccessibilityButtonController` | `getAccessibilityButtonController(int displayId)` Returns the controller of specified logical display for the accessibility button within the system's navigation area.
`final AccessibilityButtonController` | `getAccessibilityButtonController()` Returns the controller for the accessibility button within the system's navigation area.
`final FingerprintGestureController` | `getFingerprintGestureController()` Get the controller for fingerprint gestures.
`final AccessibilityService.MagnificationController` | `getMagnificationController()` Returns the magnification controller, which may be used to query and modify the state of display magnification.
`AccessibilityNodeInfo` | `getRootInActiveWindow()` Gets the root node in the currently active window if this service can retrieve window content.
`final AccessibilityServiceInfo` | `getServiceInfo()` Gets the an `AccessibilityServiceInfo` describing this `AccessibilityService`.
`final AccessibilityService.SoftKeyboardController` | `getSoftKeyboardController()` Returns the soft keyboard controller, which may be used to query and modify the soft keyboard show mode.
`final List<AccessibilityNodeInfo.AccessibilityAction>` | `getSystemActions()` Returns a list of system actions available in the system right now.
`Object` | `getSystemService(String name)` Return the handle to a system-level service by name.
`List<AccessibilityWindowInfo>` | `getWindows()` Gets the windows on the screen of the default display.
`final SparseArray<List<AccessibilityWindowInfo>>` | `getWindowsOnAllDisplays()` Gets the windows on the screen of all displays.
`abstract void` | `onAccessibilityEvent(AccessibilityEvent event)` Callback for `AccessibilityEvent`s.
`final IBinder` | `onBind(Intent intent)` Implement to return the implementation of the internal accessibility service interface.
`boolean` | `onGesture(AccessibilityGestureEvent gestureEvent)` Called by the system when the user performs a specific gesture on the specific touch screen.
`abstract void` | `onInterrupt()` Callback for interrupting the accessibility feedback.
`void` | `onSystemActionsChanged()` This is called when the system action list is changed.
`final boolean` | `performGlobalAction(int action)` Performs a global action.
`void` | `setGestureDetectionPassthroughRegion(int displayId, Region region)` When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is enabled, this function requests that touch interactions starting in the specified region of the screen bypass the gesture detector.
`final void` | `setServiceInfo(AccessibilityServiceInfo info)` Sets the `AccessibilityServiceInfo` that describes this service.
`void` | `setTouchExplorationPassthroughRegion(int displayId, Region region)` When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is enabled, this function requests that touch interactions starting in the specified region of the screen bypass the touch explorer and go straight to the view hierarchy.
`void` | `takeScreenshot(int displayId, Executor executor, AccessibilityService.TakeScreenshotCallback callback)` Takes a screenshot of the specified display and returns it via an `AccessibilityService.ScreenshotResult`.

### Protected methods
`boolean` | `onGesture(int gestureId)` This method is deprecated. Override `onGesture(android.accessibilityservice.AccessibilityGestureEvent)` instead.
`boolean` | `onKeyEvent(KeyEvent event)` Callback that allows an accessibility service to observe the key events before they are passed to the rest of the system.
`void` | `onServiceConnected()` This method is a part of the `AccessibilityService` lifecycle and is called after the system has successfully bound to the service.

### Inherited methods
From class `android.app.Service`
`void` | `attachBaseContext(Context newBase)` Set the base context for this ContextWrapper.
`void` | `dump(FileDescriptor fd, PrintWriter writer, String[] args)` Print the Service's state into the given stream.
`final Application` | `getApplication()` Return the application that owns this service.
`final int` | `getForegroundServiceType()` If the service has become a foreground service by calling `startForeground(int, android.app.Notification)` or `startForeground(int, android.app.Notification, int)`, `getForegroundServiceType()` returns the current foreground service type.
`abstract IBinder` | `onBind(Intent intent)` Return the communication channel to the service.
`void` | `onConfigurationChanged(Configuration newConfig)` Called by the system when the device configuration changes while your component is running.
`void` | `onCreate()` Called by the system when the service is first created.
`void` | `onDestroy()` Called by the system to notify a Service that it is no longer used and is being removed.
`void` | `onLowMemory()` This is called when the overall system is running low on memory, and actively running processes should trim their memory usage.
`void` | `onRebind(Intent intent)` Called when new clients have connected to the service, after it had previously been notified that all had disconnected in its `onUnbind(Intent)`.
`void` | `onStart(Intent intent, int startId)` This method is deprecated. Implement `onStartCommand(android.content.Intent, int, int)` instead.
`int` | `onStartCommand(Intent intent, int flags, int startId)` Called by the system every time a client explicitly starts the service by calling `Context.startService(Intent)`, providing the arguments it supplied and a unique integer token representing the start request.
`void` | `onTaskRemoved(Intent rootIntent)` This is called if the service is currently running and the user has removed a task that comes from the service's application.
`void` | `onTrimMemory(int level)` Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.
`boolean` | `onUnbind(Intent intent)` Called when all clients have disconnected from a particular interface published by the service.
`final void` | `startForeground(int id, Notification notification)` If your service is started (running through `Context#startService(Intent)`), then also make this service run in the foreground, supplying the ongoing notification to be shown to the user while in this state.
`final void` | `startForeground(int id, Notification notification, int foregroundServiceType)` An overloaded version of `startForeground(int, android.app.Notification)` with additional foregroundServiceType parameter.
`final void` | `stopForeground(int flags)` Remove this service from foreground state, allowing it to be killed if more memory is needed.
`final void` | `stopForeground(boolean removeNotification)` Synonym for `stopForeground(int)`.
`final void` | `stopSelf()` Stop the service, if it was previously started.
`final void` | `stopSelf(int startId)` Old version of `stopSelfResult(int)` that doesn't return a result.
`final boolean` | `stopSelfResult(int startId)` Stop the service if the most recent time it was started was startId.
From class `android.content.ContextWrapper`
`void` | `attachBaseContext(Context base)` Set the base context for this ContextWrapper.
`boolean` | `bindIsolatedService(Intent service, int flags, String instanceName, Executor executor, ServiceConnection conn)` Variation of `bindService(Intent, ServiceConnection, int)` that, in the specific case of isolated services, allows the caller to generate multiple instances of a service from a single component declaration.
`boolean` | `bindService(Intent service, int flags, Executor executor, ServiceConnection conn)` Same as `bindService(android.content.Intent, android.content.ServiceConnection, int)` with executor to control ServiceConnection callbacks.
`boolean` | `bindService(Intent service, ServiceConnection conn, int flags)` Connect to an application service, creating it if needed.
`int` | `checkCallingOrSelfPermission(String permission)` Determine whether the calling process of an IPC or you have been granted a particular permission.
`int` | `checkCallingOrSelfUriPermission(Uri uri, int modeFlags)` Determine whether the calling process of an IPC or you has been granted permission to access a specific URI.
`int` | `checkCallingPermission(String permission)` Determine whether the calling process of an IPC you are handling has been granted a particular permission.
`int` | `checkCallingUriPermission(Uri uri, int modeFlags)` Determine whether the calling process and user ID has been granted permission to access a specific URI.
`int` | `checkPermission(String permission, int pid, int uid)` Determine whether the given permission is allowed for a particular process and user ID running in the system.
`int` | `checkSelfPermission(String permission)` Determine whether you have been granted a particular permission.
`int` | `checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags)` Check both a Uri and normal permission.
`int` | `checkUriPermission(Uri uri, int pid, int uid, int modeFlags)` Determine whether a particular process and user ID has been granted permission to access a specific URI.
`void` | `clearWallpaper()` This method is deprecated. Use `WallpaperManager.clear()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`Context` | `createAttributionContext(String attributionTag)` Return a new Context object for the current Context but attribute to a different tag.
`Context` | `createConfigurationContext(Configuration overrideConfiguration)` Return a new Context object for the current Context but whose resources are adjusted to match the given Configuration.
`Context` | `createDeviceProtectedStorageContext()` Return a new Context object for the current Context but whose storage APIs are backed by device-protected storage.
`Context` | `createDisplayContext(Display display)` Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display.
`Context` | `createPackageContext(String packageName, int flags)` Return a new Context object for the given application name.
`Context` | `createWindowContext(int type, Bundle options)` Creates a Context for a non-activity window.
`String[]` | `databaseList()` Returns an array of strings naming the private databases associated with this Context's application package.
`boolean` | `deleteDatabase(String name)` Delete an existing private SQLiteDatabase associated with this Context's application package.
`boolean` | `deleteFile(String name)` Delete the given private file associated with this Context's application package.
`boolean` | `deleteSharedPreferences(String name)` Delete an existing shared preferences file.
`void` | `enforceCallingOrSelfPermission(String permission, String message)` If neither you nor the calling process of an IPC you are handling has been granted a particular permission, throw a `SecurityException`.
`void` | `enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message)` If the calling process of an IPC or you has not been granted permission to access a specific URI, throw `SecurityException`.
`void` | `enforceCallingPermission(String permission, String message)` If the calling process of an IPC you are handling has not been granted a particular permission, throw a `SecurityException`.
`void` | `enforceCallingUriPermission(Uri uri, int modeFlags, String message)` If the calling process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
`void` | `enforcePermission(String permission, int pid, int uid, String message)` If the given permission is not allowed for a particular process and user ID running in the system, throw a `SecurityException`.
`void` | `enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message)` Enforce both a Uri and normal permission.
`void` | `enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message)` If a particular process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
`String[]` | `fileList()` Returns an array of strings naming the private files associated with this Context's application package.
`Context` | `getApplicationContext()` Return the context of the single, global Application object of the current process.
`ApplicationInfo` | `getApplicationInfo()` Return the full application info for this context's package.
`AssetManager` | `getAssets()` Returns an AssetManager instance for the application's package.
`Context` | `getBaseContext()`
`File` | `getCacheDir()` Returns the absolute path to the application specific cache directory on the filesystem.
`ClassLoader` | `getClassLoader()` Return a class loader you can use to retrieve classes in this package.
`File` | `getCodeCacheDir()` Returns the absolute path to the application specific cache directory on the filesystem designed for storing cached code.
`ContentResolver` | `getContentResolver()` Return a ContentResolver instance for your application's package.
`File` | `getDataDir()` Returns the absolute path to the directory on the filesystem where all private files belonging to this app are stored.
`File` | `getDatabasePath(String name)` Returns the absolute path on the filesystem where a database created with `openOrCreateDatabase(String, int, SQLiteDatabase.CursorFactory)` is stored.
`File` | `getDir(String name, int mode)` Retrieve, creating if needed, a new directory in which the application can place its own custom data files.
`Display` | `getDisplay()` Get the display this context is associated with.
`File` | `getExternalCacheDir()` Returns absolute path to application-specific directory on the primary shared/external storage device where the application can place cache files it owns.
`File[]` | `getExternalCacheDirs()` Returns absolute paths to application-specific directories on all shared/external storage devices where the application can place cache files it owns.
`File` | `getExternalFilesDir(String type)` Returns the absolute path to the directory on the primary shared/external storage device where the application can place persistent files it owns.
`File[]` | `getExternalFilesDirs(String type)` Returns absolute paths to application-specific directories on all shared/external storage devices where the application can place persistent files it owns.
`File[]` | `getExternalMediaDirs()` This method is deprecated. These directories still exist and are scanned, but developers are encouraged to migrate to inserting content into a `MediaStore` collection directly, as any app can contribute new media to `MediaStore` with no permissions required, starting in `Build.VERSION_CODES.Q`.
`File` | `getFileStreamPath(String name)` Returns the absolute path on the filesystem where a file created with `openFileOutput(String, int)` is stored.
`File` | `getFilesDir()` Returns the absolute path to the directory on the filesystem where files created with `openFileOutput(String, int)` are stored.
`Executor` | `getMainExecutor()` Return an `Executor` that will run enqueued tasks on the main thread associated with this context.
`Looper` | `getMainLooper()` Return the Looper for the main thread of the current process.
`File` | `getNoBackupFilesDir()` Returns the absolute path to the directory on the filesystem similar to `getFilesDir()`.
`File` | `getObbDir()` Return the primary shared/external storage directory where this application's OBB files (if there are any) can be found.
`File[]` | `getObbDirs()` Returns absolute paths to application-specific directories on all shared/external storage devices where the application's OBB files (if there are any) can be found.
`String` | `getPackageCodePath()` Return the full path to this context's primary Android package.
`PackageManager` | `getPackageManager()` Return PackageManager instance to find global package information.
`String` | `getPackageName()` Return the name of this application's package.
`String` | `getPackageResourcePath()` Return the full path to this context's primary Android package.
`Resources` | `getResources()` Returns a Resources instance for the application's package.
`SharedPreferences` | `getSharedPreferences(String name, int mode)` Retrieve and hold the contents of the preferences file 'name', returning a SharedPreferences through which you can retrieve and modify its values.
`Object` | `getSystemService(String name)` Return the handle to a system-level service by name.
`String` | `getSystemServiceName(Class<?> serviceClass)` Gets the name of the system-level service that is represented by the specified class.
`Resources.Theme` | `getTheme()` Return the Theme object associated with this Context.
`Drawable` | `getWallpaper()` This method is deprecated. Use `WallpaperManager.get()` instead.
`int` | `getWallpaperDesiredMinimumHeight()` This method is deprecated. Use `WallpaperManager.getDesiredMinimumHeight()` instead.
`int` | `getWallpaperDesiredMinimumWidth()` This method is deprecated. Use `WallpaperManager.getDesiredMinimumWidth()` instead.
`void` | `grantUriPermission(String toPackage, Uri uri, int modeFlags)` Grant permission to access a specific Uri to another package, regardless of whether that package has general permission to access the Uri's content provider.
`boolean` | `isDeviceProtectedStorage()` Indicates if the storage APIs of this Context are backed by device-protected storage.
`boolean` | `isRestricted()` Indicates whether this Context is restricted.
`boolean` | `moveDatabaseFrom(Context sourceContext, String name)` Move an existing database file from the given source storage context to this context.
`boolean` | `moveSharedPreferencesFrom(Context sourceContext, String name)` Move an existing shared preferences file from the given source storage context to this context.
`FileInputStream` | `openFileInput(String name)` Open a private file associated with this Context's application package for reading.
`FileOutputStream` | `openFileOutput(String name, int mode)` Open a private file associated with this Context's application package for writing.
`SQLiteDatabase` | `openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler)` Open a new private SQLiteDatabase associated with this Context's application package.
`SQLiteDatabase` | `openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory)` Open a new private SQLiteDatabase associated with this Context's application package.
`Drawable` | `peekWallpaper()` This method is deprecated. Use `WallpaperManager.peek()` instead.
`Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter)` Register a BroadcastReceiver to be run in the main activity thread.
`Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, int flags)` Register to receive intent broadcasts, with the receiver optionally being exposed to Instant Apps.
`Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler, int flags)` Register to receive intent broadcasts, to run in the context of scheduler.
`Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler)` Register to receive intent broadcasts, to run in the context of scheduler.
`void` | `removeStickyBroadcast(Intent intent)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `removeStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `revokeUriPermission(Uri uri, int modeFlags)` Remove all permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)` or any other mechanism.
`void` | `revokeUriPermission(String targetPackage, Uri uri, int modeFlags)` Remove permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)` for a specific target package.
`void` | `sendBroadcast(Intent intent, String receiverPermission)` Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced.
`void` | `sendBroadcast(Intent intent)` Broadcast the given intent to all interested BroadcastReceivers.
`void` | `sendBroadcastAsUser(Intent intent, UserHandle user)` Version of `sendBroadcast(android.content.Intent)` that allows you to specify the user the broadcast will be sent to.
`void` | `sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission)` Version of `sendBroadcast(android.content.Intent, java.lang.String)` that allows you to specify the user the broadcast will be sent to.
`void` | `sendOrderedBroadcast(Intent intent, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)` that allows you to specify the App Op to enforce restrictions on which receivers the broadcast will be sent to.
`void` | `sendOrderedBroadcast(Intent intent, int initialCode, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, String initialData, Bundle initialExtras, Bundle options)`
`void` | `sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendBroadcast(android.content.Intent)` that allows you to receive data back from the broadcast.
`void` | `sendOrderedBroadcast(Intent intent, String receiverPermission)` Broadcast the given intent to all interested BroadcastReceivers, delivering them one at a time to allow more preferred receivers to consume the broadcast before it is delivered to less preferred receivers.
`void` | `sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)` that allows you to specify the user the broadcast will be sent to.
`void` | `sendStickyBroadcast(Intent intent)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `sendStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`void` | `setTheme(int resid)` Set the base theme for this context.
`void` | `setWallpaper(Bitmap bitmap)` This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`void` | `setWallpaper(InputStream data)` This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`void` | `startActivities(Intent[] intents, Bundle options)` Launch multiple new activities.
`void` | `startActivities(Intent[] intents)` Same as `startActivities(android.content.Intent[], android.os.Bundle)` with no options specified.
`void` | `startActivity(Intent intent)` Same as `startActivity(android.content.Intent, android.os.Bundle)` with no options specified.
`void` | `startActivity(Intent intent, Bundle options)` Launch a new activity.
`ComponentName` | `startForegroundService(Intent service)` Similar to `startService(android.content.Intent)`, but with an implicit promise that the Service will call `startForeground(int, android.app.Notification)` once it begins running.
`boolean` | `startInstrumentation(ComponentName className, String profileFile, Bundle arguments)` Start executing an `Instrumentation` class.
`void` | `startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)` Same as `startIntentSender(android.content.IntentSender, android.content.Intent, int, int, int, android.os.Bundle)` with no options specified.
`void` | `startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)` Like `startActivity(android.content.Intent, android.os.Bundle)`, but taking a IntentSender to start.
`ComponentName` | `startService(Intent service)` Request that a given application service be started.
`boolean` | `stopService(Intent name)` Request that a given application service be stopped.
`void` | `unbindService(ServiceConnection conn)` Disconnect from an application service.
`void` | `unregisterReceiver(BroadcastReceiver receiver)` Unregister a previously registered BroadcastReceiver.
`void` | `updateServiceGroup(ServiceConnection conn, int group, int importance)` For a service previously bound with `bindService(Intent, ServiceConnection, int)` or a related method, change how the system manages that service's process in relation to other processes.
From class `android.content.Context`
`boolean` | `bindIsolatedService(Intent service, int flags, String instanceName, Executor executor, ServiceConnection conn)` Variation of `bindService(Intent, ServiceConnection, int)` that, in the specific case of isolated services, allows the caller to generate multiple instances of a service from a single component declaration.
`boolean` | `bindService(Intent service, int flags, Executor executor, ServiceConnection conn)` Same as `bindService(android.content.Intent, android.content.ServiceConnection, int)` with executor to control ServiceConnection callbacks.
`abstract boolean` | `bindService(Intent service, ServiceConnection conn, int flags)` Connect to an application service, creating it if needed.
`boolean` | `bindServiceAsUser(Intent service, ServiceConnection conn, int flags, UserHandle user)` Binds to a service in the given `user` in the same manner as `bindService(android.content.Intent, android.content.ServiceConnection, int)`.
`abstract int` | `checkCallingOrSelfPermission(String permission)` Determine whether the calling process of an IPC or you have been granted a particular permission.
`abstract int` | `checkCallingOrSelfUriPermission(Uri uri, int modeFlags)` Determine whether the calling process of an IPC or you has been granted permission to access a specific URI.
`abstract int` | `checkCallingPermission(String permission)` Determine whether the calling process of an IPC you are handling has been granted a particular permission.
`abstract int` | `checkCallingUriPermission(Uri uri, int modeFlags)` Determine whether the calling process and user ID has been granted permission to access a specific URI.
`abstract int` | `checkPermission(String permission, int pid, int uid)` Determine whether the given permission is allowed for a particular process and user ID running in the system.
`abstract int` | `checkSelfPermission(String permission)` Determine whether you have been granted a particular permission.
`abstract int` | `checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags)` Check both a Uri and normal permission.
`abstract int` | `checkUriPermission(Uri uri, int pid, int uid, int modeFlags)` Determine whether a particular process and user ID has been granted permission to access a specific URI.
`abstract void` | `clearWallpaper()` This method is deprecated. Use `WallpaperManager.clear()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`Context` | `createAttributionContext(String attributionTag)` Return a new Context object for the current Context but attribute to a different tag.
`abstract Context` | `createConfigurationContext(Configuration overrideConfiguration)` Return a new Context object for the current Context but whose resources are adjusted to match the given Configuration.
`abstract Context` | `createContextForSplit(String splitName)` Return a new Context object for the given split name.
`abstract Context` | `createDeviceProtectedStorageContext()` Return a new Context object for the current Context but whose storage APIs are backed by device-protected storage.
`abstract Context` | `createDisplayContext(Display display)` Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display.
`abstract Context` | `createPackageContext(String packageName, int flags)` Return a new Context object for the given application name.
`Context` | `createWindowContext(int type, Bundle options)` Creates a Context for a non-activity window.
`abstract String[]` | `databaseList()` Returns an array of strings naming the private databases associated with this Context's application package.
`abstract boolean` | `deleteDatabase(String name)` Delete an existing private SQLiteDatabase associated with this Context's application package.
`abstract boolean` | `deleteFile(String name)` Delete the given private file associated with this Context's application package.
`abstract boolean` | `deleteSharedPreferences(String name)` Delete an existing shared preferences file.
`abstract void` | `enforceCallingOrSelfPermission(String permission, String message)` If neither you nor the calling process of an IPC you are handling has been granted a particular permission, throw a `SecurityException`.
`abstract void` | `enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message)` If the calling process of an IPC or you has not been granted permission to access a specific URI, throw `SecurityException`.
`abstract void` | `enforceCallingPermission(String permission, String message)` If the calling process of an IPC you are handling has not been granted a particular permission, throw a `SecurityException`.
`abstract void` | `enforceCallingUriPermission(Uri uri, int modeFlags, String message)` If the calling process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
`abstract void` | `enforcePermission(String permission, int pid, int uid, String message)` If the given permission is not allowed for a particular process and user ID running in the system, throw a `SecurityException`.
`abstract void` | `enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message)` Enforce both a Uri and normal permission.
`abstract void` | `enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message)` If a particular process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
`abstract String[]` | `fileList()` Returns an array of strings naming the private files associated with this Context's application package.
`abstract Context` | `getApplicationContext()` Return the context of the single, global Application object of the current process.
`abstract ApplicationInfo` | `getApplicationInfo()` Return the full application info for this context's package.
`abstract AssetManager` | `getAssets()` Returns an AssetManager instance for the application's package.
`String` | `getAttributionTag()` Attribution can be used in complex apps to logically separate parts of the app.
`abstract File` | `getCacheDir()` Returns the absolute path to the application specific cache directory on the filesystem.
`abstract ClassLoader` | `getClassLoader()` Return a class loader you can use to retrieve classes in this package.
`abstract File` | `getCodeCacheDir()` Returns the absolute path to the application specific cache directory on the filesystem designed for storing cached code.
`final int` | `getColor(int id)` Returns a color associated with a particular resource ID and styled for the current theme.
`final ColorStateList` | `getColorStateList(int id)` Returns a color state list associated with a particular resource ID and styled for the current theme.
`abstract ContentResolver` | `getContentResolver()` Return a ContentResolver instance for your application's package.
`abstract File` | `getDataDir()` Returns the absolute path to the directory on the filesystem where all private files belonging to this app are stored.
`abstract File` | `getDatabasePath(String name)` Returns the absolute path on the filesystem where a database created with `openOrCreateDatabase(String, int, SQLiteDatabase.CursorFactory)` is stored.
`abstract File` | `getDir(String name, int mode)` Retrieve, creating if needed, a new directory in which the application can place its own custom data files.
`Display` | `getDisplay()` Get the display this context is associated with.
`final Drawable` | `getDrawable(int id)` Returns a drawable object associated with a particular resource ID and styled for the current theme.
`abstract File` | `getExternalCacheDir()` Returns absolute path to application-specific directory on the primary shared/external storage device where the application can place cache files it owns.
`abstract File[]` | `getExternalCacheDirs()` Returns absolute paths to application-specific directories on all shared/external storage devices where the application can place cache files it owns.
`abstract File` | `getExternalFilesDir(String type)` Returns the absolute path to the directory on the primary shared/external storage device where the application can place persistent files it owns.
`abstract File[]` | `getExternalFilesDirs(String type)` Returns absolute paths to application-specific directories on all shared/external storage devices where the application can place persistent files it owns.
`abstract File[]` | `getExternalMediaDirs()` This method is deprecated. These directories still exist and are scanned, but developers are encouraged to migrate to inserting content into a `MediaStore` collection directly, as any app can contribute new media to `MediaStore` with no permissions required, starting in `Build.VERSION_CODES.Q`.
`abstract File` | `getFileStreamPath(String name)` Returns the absolute path on the filesystem where a file created with `openFileOutput(String, int)` is stored.
`abstract File` | `getFilesDir()` Returns the absolute path to the directory on the filesystem where files created with `openFileOutput(String, int)` are stored.
`Executor` | `getMainExecutor()` Return an `Executor` that will run enqueued tasks on the main thread associated with this context.
`abstract Looper` | `getMainLooper()` Return the Looper for the main thread of the current process.
`abstract File` | `getNoBackupFilesDir()` Returns the absolute path to the directory on the filesystem similar to `getFilesDir()`.
`abstract File` | `getObbDir()` Return the primary shared/external storage directory where this application's OBB files (if there are any) can be found.
`abstract File[]` | `getObbDirs()` Returns absolute paths to application-specific directories on all shared/external storage devices where the application's OBB files (if there are any) can be found.
`String` | `getOpPackageName()` Return the package name that should be used for `AppOpsManager` calls from this context, so that app ops manager's uid verification will work with the name.
`abstract String` | `getPackageCodePath()` Return the full path to this context's primary Android package.
`abstract PackageManager` | `getPackageManager()` Return PackageManager instance to find global package information.
`abstract String` | `getPackageName()` Return the name of this application's package.
`abstract String` | `getPackageResourcePath()` Return the full path to this context's primary Android package.
`abstract Resources` | `getResources()` Returns a Resources instance for the application's package.
`abstract SharedPreferences` | `getSharedPreferences(String name, int mode)` Retrieve and hold the contents of the preferences file 'name', returning a SharedPreferences through which you can retrieve and modify its values.
`final String` | `getString(int resId, Object... formatArgs)` Returns a localized formatted string from the application's package's default string table, substituting the format arguments as defined in `Formatter` and `String.format(String, Object...)`.
`final String` | `getString(int resId)` Returns a localized string from the application's package's default string table.
`final <T> T` | `getSystemService(Class<T> serviceClass)` Return the handle to a system-level service by class.
`abstract Object` | `getSystemService(String name)` Return the handle to a system-level service by name.
`abstract String` | `getSystemServiceName(Class<?> serviceClass)` Gets the name of the system-level service that is represented by the specified class.
`final CharSequence` | `getText(int resId)` Return a localized, styled CharSequence from the application's package's default string table.
`abstract Resources.Theme` | `getTheme()` Return the Theme object associated with this Context.
`abstract Drawable` | `getWallpaper()` This method is deprecated. Use `WallpaperManager.get()` instead.
`abstract int` | `getWallpaperDesiredMinimumHeight()` This method is deprecated. Use `WallpaperManager.getDesiredMinimumHeight()` instead.
`abstract int` | `getWallpaperDesiredMinimumWidth()` This method is deprecated. Use `WallpaperManager.getDesiredMinimumWidth()` instead.
`abstract void` | `grantUriPermission(String toPackage, Uri uri, int modeFlags)` Grant permission to access a specific Uri to another package, regardless of whether that package has general permission to access the Uri's content provider.
`abstract boolean` | `isDeviceProtectedStorage()` Indicates if the storage APIs of this Context are backed by device-protected storage.
`boolean` | `isRestricted()` Indicates whether this Context is restricted.
`abstract boolean` | `moveDatabaseFrom(Context sourceContext, String name)` Move an existing database file from the given source storage context to this context.
`abstract boolean` | `moveSharedPreferencesFrom(Context sourceContext, String name)` Move an existing shared preferences file from the given source storage context to this context.
`final TypedArray` | `obtainStyledAttributes(AttributeSet set, int[] attrs)` Retrieve styled attribute information in this Context's theme.
`final TypedArray` | `obtainStyledAttributes(AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes)` Retrieve styled attribute information in this Context's theme.
`final TypedArray` | `obtainStyledAttributes(int resid, int[] attrs)` Retrieve styled attribute information in this Context's theme.
`final TypedArray` | `obtainStyledAttributes(int[] attrs)` Retrieve styled attribute information in this Context's theme.
`abstract FileInputStream` | `openFileInput(String name)` Open a private file associated with this Context's application package for reading.
`abstract FileOutputStream` | `openFileOutput(String name, int mode)` Open a private file associated with this Context's application package for writing.
`abstract SQLiteDatabase` | `openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler)` Open a new private SQLiteDatabase associated with this Context's application package.
`abstract SQLiteDatabase` | `openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory)` Open a new private SQLiteDatabase associated with this Context's application package.
`abstract Drawable` | `peekWallpaper()` This method is deprecated. Use `WallpaperManager.peek()` instead.
`void` | `registerComponentCallbacks(ComponentCallbacks callback)` Add a new `ComponentCallbacks` to the base application of the Context, which will be called at the same times as the ComponentCallbacks methods of activities and other components are called.
`abstract Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter)` Register a BroadcastReceiver to be run in the main activity thread.
`abstract Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, int flags)` Register to receive intent broadcasts, with the receiver optionally being exposed to Instant Apps.
`abstract Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler, int flags)` Register to receive intent broadcasts, to run in the context of scheduler.
`abstract Intent` | `registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler)` Register to receive intent broadcasts, to run in the context of scheduler.
`abstract void` | `removeStickyBroadcast(Intent intent)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `removeStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `revokeUriPermission(Uri uri, int modeFlags)` Remove all permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)` or any other mechanism.
`abstract void` | `revokeUriPermission(String toPackage, Uri uri, int modeFlags)` Remove permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)` for a specific target package.
`abstract void` | `sendBroadcast(Intent intent, String receiverPermission)` Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced.
`abstract void` | `sendBroadcast(Intent intent)` Broadcast the given intent to all interested BroadcastReceivers.
`abstract void` | `sendBroadcastAsUser(Intent intent, UserHandle user)` Version of `sendBroadcast(android.content.Intent)` that allows you to specify the user the broadcast will be sent to.
`abstract void` | `sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission)` Version of `sendBroadcast(android.content.Intent, java.lang.String)` that allows you to specify the user the broadcast will be sent to.
`void` | `sendBroadcastWithMultiplePermissions(Intent intent, String[] receiverPermissions)` Broadcast the given intent to all interested BroadcastReceivers, allowing an array of required permissions to be enforced.
`void` | `sendOrderedBroadcast(Intent intent, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)` that allows you to specify the App Op to enforce restrictions on which receivers the broadcast will be sent to.
`abstract void` | `sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendBroadcast(android.content.Intent)` that allows you to receive data back from the broadcast.
`abstract void` | `sendOrderedBroadcast(Intent intent, String receiverPermission)` Broadcast the given intent to all interested BroadcastReceivers, delivering them one at a time to allow more preferred receivers to consume the broadcast before it is delivered to less preferred receivers.
`abstract void` | `sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` Version of `sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)` that allows you to specify the user the broadcast will be sent to.
`abstract void` | `sendStickyBroadcast(Intent intent)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `sendStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)` This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
`abstract void` | `setTheme(int resid)` Set the base theme for this context.
`abstract void` | `setWallpaper(Bitmap bitmap)` This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`abstract void` | `setWallpaper(InputStream data)` This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `Manifest.permission.SET_WALLPAPER`.
`abstract void` | `startActivities(Intent[] intents, Bundle options)` Launch multiple new activities.
`abstract void` | `startActivities(Intent[] intents)` Same as `startActivities(android.content.Intent[], android.os.Bundle)` with no options specified.
`abstract void` | `startActivity(Intent intent)` Same as `startActivity(android.content.Intent, android.os.Bundle)` with no options specified.
`abstract void` | `startActivity(Intent intent, Bundle options)` Launch a new activity.
`abstract ComponentName` | `startForegroundService(Intent service)` Similar to `startService(android.content.Intent)`, but with an implicit promise that the Service will call `startForeground(int, android.app.Notification)` once it begins running.
`abstract boolean` | `startInstrumentation(ComponentName className, String profileFile, Bundle arguments)` Start executing an `Instrumentation` class.
`abstract void` | `startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)` Same as `startIntentSender(android.content.IntentSender, android.content.Intent, int, int, int, android.os.Bundle)` with no options specified.
`abstract void` | `startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)` Like `startActivity(android.content.Intent, android.os.Bundle)`, but taking a IntentSender to start.
`abstract ComponentName` | `startService(Intent service)` Request that a given application service be started.
`abstract boolean` | `stopService(Intent service)` Request that a given application service be stopped.
`abstract void` | `unbindService(ServiceConnection conn)` Disconnect from an application service.
`void` | `unregisterComponentCallbacks(ComponentCallbacks callback)` Remove a `ComponentCallbacks` object that was previously registered with `registerComponentCallbacks(android.content.ComponentCallbacks)`.
`abstract void` | `unregisterReceiver(BroadcastReceiver receiver)` Unregister a previously registered BroadcastReceiver.
`void` | `updateServiceGroup(ServiceConnection conn, int group, int importance)` For a service previously bound with `bindService(Intent, ServiceConnection, int)` or a related method, change how the system manages that service's process in relation to other processes.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `android.content.ComponentCallbacks2`
`abstract void` | `onTrimMemory(int level)` Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.
From interface `android.content.ComponentCallbacks`
`abstract void` | `onConfigurationChanged(Configuration newConfig)` Called by the system when the device configuration changes while your component is running.
`abstract void` | `onLowMemory()` This is called when the overall system is running low on memory, and actively running processes should trim their memory usage.

## Constants

### ERROR_TAKE_SCREENSHOT_INTERNAL_ERROR

    public static final int ERROR_TAKE_SCREENSHOT_INTERNAL_ERROR

The status of taking screenshot is failure and the reason is internal error.

Constant Value: 1 (0x00000001)

### ERROR_TAKE_SCREENSHOT_INTERVAL_TIME_SHORT

    public static final int ERROR_TAKE_SCREENSHOT_INTERVAL_TIME_SHORT

The status of taking screenshot is failure and the reason is that too little time has elapsed since the last screenshot.

Constant Value: 3 (0x00000003)

### ERROR_TAKE_SCREENSHOT_INVALID_DISPLAY

    public static final int ERROR_TAKE_SCREENSHOT_INVALID_DISPLAY

The status of taking screenshot is failure and the reason is invalid display Id.

Constant Value: 4 (0x00000004)

### ERROR_TAKE_SCREENSHOT_NO_ACCESSIBILITY_ACCESS

    public static final int ERROR_TAKE_SCREENSHOT_NO_ACCESSIBILITY_ACCESS

The status of taking screenshot is failure and the reason is no accessibility access.

Constant Value: 2 (0x00000002)

### GESTURE_2_FINGER_DOUBLE_TAP

    public static final int GESTURE_2_FINGER_DOUBLE_TAP

The user has performed a two-finger double tap gesture on the touch screen.

Constant Value: 20 (0x00000014)

### GESTURE_2_FINGER_DOUBLE_TAP_AND_HOLD

    public static final int GESTURE_2_FINGER_DOUBLE_TAP_AND_HOLD

The user has performed a two-finger double tap and hold gesture on the touch screen.

Constant Value: 40 (0x00000028)

### GESTURE_2_FINGER_SINGLE_TAP

    public static final int GESTURE_2_FINGER_SINGLE_TAP

The user has performed a two-finger single tap gesture on the touch screen.

Constant Value: 19 (0x00000013)

### GESTURE_2_FINGER_SWIPE_DOWN

    public static final int GESTURE_2_FINGER_SWIPE_DOWN

The user has performed a two-finger swipe down gesture on the touch screen.

Constant Value: 26 (0x0000001a)

### GESTURE_2_FINGER_SWIPE_LEFT

    public static final int GESTURE_2_FINGER_SWIPE_LEFT

The user has performed a two-finger swipe left gesture on the touch screen.

Constant Value: 27 (0x0000001b)

### GESTURE_2_FINGER_SWIPE_RIGHT

    public static final int GESTURE_2_FINGER_SWIPE_RIGHT

The user has performed a two-finger swipe right gesture on the touch screen.

Constant Value: 28 (0x0000001c)

### GESTURE_2_FINGER_SWIPE_UP

    public static final int GESTURE_2_FINGER_SWIPE_UP

The user has performed a two-finger swipe up gesture on the touch screen.

Constant Value: 25 (0x00000019)

### GESTURE_2_FINGER_TRIPLE_TAP

    public static final int GESTURE_2_FINGER_TRIPLE_TAP

The user has performed a two-finger triple tap gesture on the touch screen.

Constant Value: 21 (0x00000015)

### GESTURE_3_FINGER_DOUBLE_TAP

    public static final int GESTURE_3_FINGER_DOUBLE_TAP

The user has performed a three-finger double tap gesture on the touch screen.

Constant Value: 23 (0x00000017)

### GESTURE_3_FINGER_DOUBLE_TAP_AND_HOLD

    public static final int GESTURE_3_FINGER_DOUBLE_TAP_AND_HOLD

The user has performed a three-finger double tap and hold gesture on the touch screen.

Constant Value: 41 (0x00000029)

### GESTURE_3_FINGER_SINGLE_TAP

    public static final int GESTURE_3_FINGER_SINGLE_TAP

The user has performed a three-finger single tap gesture on the touch screen.

Constant Value: 22 (0x00000016)

### GESTURE_3_FINGER_SWIPE_DOWN

    public static final int GESTURE_3_FINGER_SWIPE_DOWN

The user has performed a three-finger swipe down gesture on the touch screen.

Constant Value: 30 (0x0000001e)

### GESTURE_3_FINGER_SWIPE_LEFT

    public static final int GESTURE_3_FINGER_SWIPE_LEFT

The user has performed a three-finger swipe left gesture on the touch screen.

Constant Value: 31 (0x0000001f)

### GESTURE_3_FINGER_SWIPE_RIGHT

    public static final int GESTURE_3_FINGER_SWIPE_RIGHT

The user has performed a three-finger swipe right gesture on the touch screen.

Constant Value: 32 (0x00000020)

### GESTURE_3_FINGER_SWIPE_UP

    public static final int GESTURE_3_FINGER_SWIPE_UP

The user has performed a three-finger swipe up gesture on the touch screen.

Constant Value: 29 (0x0000001d)

### GESTURE_3_FINGER_TRIPLE_TAP

    public static final int GESTURE_3_FINGER_TRIPLE_TAP

The user has performed a three-finger triple tap gesture on the touch screen.

Constant Value: 24 (0x00000018)

### GESTURE_4_FINGER_DOUBLE_TAP

    public static final int GESTURE_4_FINGER_DOUBLE_TAP

The user has performed a four-finger double tap gesture on the touch screen.

Constant Value: 38 (0x00000026)

### GESTURE_4_FINGER_DOUBLE_TAP_AND_HOLD

    public static final int GESTURE_4_FINGER_DOUBLE_TAP_AND_HOLD

The user has performed a two-finger double tap and hold gesture on the touch screen.

Constant Value: 42 (0x0000002a)

### GESTURE_4_FINGER_SINGLE_TAP

    public static final int GESTURE_4_FINGER_SINGLE_TAP

The user has performed a four-finger single tap gesture on the touch screen.

Constant Value: 37 (0x00000025)

### GESTURE_4_FINGER_SWIPE_DOWN

    public static final int GESTURE_4_FINGER_SWIPE_DOWN

The user has performed a four-finger swipe down gesture on the touch screen.

Constant Value: 34 (0x00000022)

### GESTURE_4_FINGER_SWIPE_LEFT

    public static final int GESTURE_4_FINGER_SWIPE_LEFT

The user has performed a four-finger swipe left gesture on the touch screen.

Constant Value: 35 (0x00000023)

### GESTURE_4_FINGER_SWIPE_RIGHT

    public static final int GESTURE_4_FINGER_SWIPE_RIGHT

The user has performed a four-finger swipe right gesture on the touch screen.

Constant Value: 36 (0x00000024)

### GESTURE_4_FINGER_SWIPE_UP

    public static final int GESTURE_4_FINGER_SWIPE_UP

The user has performed a four-finger swipe up gesture on the touch screen.

Constant Value: 33 (0x00000021)

### GESTURE_4_FINGER_TRIPLE_TAP

    public static final int GESTURE_4_FINGER_TRIPLE_TAP

The user has performed a four-finger triple tap gesture on the touch screen.

Constant Value: 39 (0x00000027)

### GESTURE_DOUBLE_TAP

    public static final int GESTURE_DOUBLE_TAP

The user has performed a double tap gesture on the touch screen.

Constant Value: 17 (0x00000011)

### GESTURE_DOUBLE_TAP_AND_HOLD

    public static final int GESTURE_DOUBLE_TAP_AND_HOLD

The user has performed a double tap and hold gesture on the touch screen.

Constant Value: 18 (0x00000012)

### GESTURE_SWIPE_DOWN

    public static final int GESTURE_SWIPE_DOWN

The user has performed a swipe down gesture on the touch screen.

Constant Value: 2 (0x00000002)

### GESTURE_SWIPE_DOWN_AND_LEFT

    public static final int GESTURE_SWIPE_DOWN_AND_LEFT

The user has performed an down and left gesture on the touch screen.

Constant Value: 15 (0x0000000f)

### GESTURE_SWIPE_DOWN_AND_RIGHT

    public static final int GESTURE_SWIPE_DOWN_AND_RIGHT

The user has performed an down and right gesture on the touch screen.

Constant Value: 16 (0x00000010)

### GESTURE_SWIPE_DOWN_AND_UP

    public static final int GESTURE_SWIPE_DOWN_AND_UP

The user has performed a swipe down and up gesture on the touch screen.

Constant Value: 8 (0x00000008)

### GESTURE_SWIPE_LEFT

    public static final int GESTURE_SWIPE_LEFT

The user has performed a swipe left gesture on the touch screen.

Constant Value: 3 (0x00000003)

### GESTURE_SWIPE_LEFT_AND_DOWN

    public static final int GESTURE_SWIPE_LEFT_AND_DOWN

The user has performed a left and down gesture on the touch screen.

Constant Value: 10 (0x0000000a)

### GESTURE_SWIPE_LEFT_AND_RIGHT

    public static final int GESTURE_SWIPE_LEFT_AND_RIGHT

The user has performed a swipe left and right gesture on the touch screen.

Constant Value: 5 (0x00000005)

### GESTURE_SWIPE_LEFT_AND_UP

    public static final int GESTURE_SWIPE_LEFT_AND_UP

The user has performed a left and up gesture on the touch screen.

Constant Value: 9 (0x00000009)

### GESTURE_SWIPE_RIGHT

    public static final int GESTURE_SWIPE_RIGHT

The user has performed a swipe right gesture on the touch screen.

Constant Value: 4 (0x00000004)

### GESTURE_SWIPE_RIGHT_AND_DOWN

    public static final int GESTURE_SWIPE_RIGHT_AND_DOWN

The user has performed a right and down gesture on the touch screen.

Constant Value: 12 (0x0000000c)

### GESTURE_SWIPE_RIGHT_AND_LEFT

    public static final int GESTURE_SWIPE_RIGHT_AND_LEFT

The user has performed a swipe right and left gesture on the touch screen.

Constant Value: 6 (0x00000006)

### GESTURE_SWIPE_RIGHT_AND_UP

    public static final int GESTURE_SWIPE_RIGHT_AND_UP

The user has performed a right and up gesture on the touch screen.

Constant Value: 11 (0x0000000b)

### GESTURE_SWIPE_UP

    public static final int GESTURE_SWIPE_UP

The user has performed a swipe up gesture on the touch screen.

Constant Value: 1 (0x00000001)

### GESTURE_SWIPE_UP_AND_DOWN

    public static final int GESTURE_SWIPE_UP_AND_DOWN

The user has performed a swipe up and down gesture on the touch screen.

Constant Value: 7 (0x00000007)

### GESTURE_SWIPE_UP_AND_LEFT

    public static final int GESTURE_SWIPE_UP_AND_LEFT

The user has performed an up and left gesture on the touch screen.

Constant Value: 13 (0x0000000d)

### GESTURE_SWIPE_UP_AND_RIGHT

    public static final int GESTURE_SWIPE_UP_AND_RIGHT

The user has performed an up and right gesture on the touch screen.

Constant Value: 14 (0x0000000e)

### GLOBAL_ACTION_BACK

    public static final int GLOBAL_ACTION_BACK

Action to go back.

Constant Value: 1 (0x00000001)

### GLOBAL_ACTION_HOME

    public static final int GLOBAL_ACTION_HOME

Action to go home.

Constant Value: 2 (0x00000002)

### GLOBAL_ACTION_LOCK_SCREEN

    public static final int GLOBAL_ACTION_LOCK_SCREEN

Action to lock the screen

Constant Value: 8 (0x00000008)

### GLOBAL_ACTION_NOTIFICATIONS

    public static final int GLOBAL_ACTION_NOTIFICATIONS

Action to open the notifications.

Constant Value: 4 (0x00000004)

### GLOBAL_ACTION_POWER_DIALOG

    public static final int GLOBAL_ACTION_POWER_DIALOG

Action to open the power long-press dialog.

Constant Value: 6 (0x00000006)

### GLOBAL_ACTION_QUICK_SETTINGS

    public static final int GLOBAL_ACTION_QUICK_SETTINGS

Action to open the quick settings.

Constant Value: 5 (0x00000005)

### GLOBAL_ACTION_RECENTS

    public static final int GLOBAL_ACTION_RECENTS

Action to toggle showing the overview of recent apps. Will fail on platforms that don't show recent apps.

Constant Value: 3 (0x00000003)

### GLOBAL_ACTION_TAKE_SCREENSHOT

    public static final int GLOBAL_ACTION_TAKE_SCREENSHOT

Action to take a screenshot

Constant Value: 9 (0x00000009)

### GLOBAL_ACTION_TOGGLE_SPLIT_SCREEN

    public static final int GLOBAL_ACTION_TOGGLE_SPLIT_SCREEN

Action to toggle docking the current app's window

Constant Value: 7 (0x00000007)

### SERVICE_INTERFACE

    public static final String SERVICE_INTERFACE

The `Intent` that must be declared as handled by the service.

Constant Value: "android.accessibilityservice.AccessibilityService"

### SERVICE_META_DATA

    public static final String SERVICE_META_DATA

Name under which an AccessibilityService component publishes information about itself. This meta-data must reference an XML resource containing an `<`accessibility-service`>` tag. This is a sample XML file configuring an accessibility service:

     <accessibility-service
         android:accessibilityEventTypes="typeViewClicked|typeViewFocused"
         android:packageNames="foo.bar, foo.baz"
         android:accessibilityFeedbackType="feedbackSpoken"
         android:notificationTimeout="100"
         android:accessibilityFlags="flagDefault"
         android:settingsActivity="foo.bar.TestBackActivity"
         android:canRetrieveWindowContent="true"
         android:canRequestTouchExplorationMode="true"
         . . .
     />

Constant Value: "android.accessibilityservice"

### SHOW_MODE_AUTO

    public static final int SHOW_MODE_AUTO

Allow the system to control when the soft keyboard is shown.

See also:

- `AccessibilityService.SoftKeyboardController`

Constant Value: 0 (0x00000000)

### SHOW_MODE_HIDDEN

    public static final int SHOW_MODE_HIDDEN

Never show the soft keyboard.

See also:

- `AccessibilityService.SoftKeyboardController`

Constant Value: 1 (0x00000001)

### SHOW_MODE_IGNORE_HARD_KEYBOARD

    public static final int SHOW_MODE_IGNORE_HARD_KEYBOARD

Allow the soft keyboard to be shown, even if a hard keyboard is connected

See also:

- `AccessibilityService.SoftKeyboardController`

Constant Value: 2 (0x00000002)

## Public constructors

### AccessibilityService

    public AccessibilityService ()

## Public methods

### createDisplayContext

    public Context createDisplayContext (Display display)

Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display. Each call to this method returns a new instance of a Context object; Context objects are not shared, however common state (ClassLoader, other Resources for the same configuration) may be so the Context itself can be fairly lightweight. To obtain an instance of a `WindowManager` (see `getSystemService(java.lang.String)`) that is configured to show windows on the given display call `createWindowContext(int, android.os.Bundle)` on the returned display Context or use an `Activity`.

Parameters
`display` | `Display`: A `Display` object specifying the display for whose metrics the Context's resources should be tailored. This value cannot be `null`.

Returns
`Context` | A `Context` for the display.

### disableSelf

    public final void disableSelf ()

Disables the service. After calling this method, the service will be disabled and settings will show that it is turned off.

### dispatchGesture

    public final boolean dispatchGesture (GestureDescription gesture,
                    AccessibilityService.GestureResultCallback callback,
                    Handler handler)

Dispatch a gesture to the touch screen. Any gestures currently in progress, whether from the user, this service, or another service, will be cancelled.

The gesture will be dispatched as if it were performed directly on the screen by a user, so the events may be affected by features such as magnification and explore by touch.

Note: In order to dispatch gestures, your service must declare the capability by setting the `R.styleable.AccessibilityService_canPerformGestures` property in its meta-data. For more information, see `SERVICE_META_DATA`.

Parameters
`gesture` | `GestureDescription`: The gesture to dispatch This value cannot be `null`.
`callback` | `AccessibilityService.GestureResultCallback`: The object to call back when the status of the gesture is known. If `null`, no status is reported. This value may be `null`.
`handler` | `Handler`: The handler on which to call back the `callback` object. If `null`, the object is called back on the service's main thread. This value may be `null`.

Returns
`boolean` | `true` if the gesture is dispatched, `false` if not.

### findFocus

    public AccessibilityNodeInfo findFocus (int focus)

Find the view that has the specified focus type. The search is performed across all windows.

Note: In order to access the windows your service has to declare the capability to retrieve window content by setting the `R.styleable.AccessibilityService_canRetrieveWindowContent` property in its meta-data. For details refer to `SERVICE_META_DATA`. Also the service has to opt-in to retrieve the interactive windows by setting the `AccessibilityServiceInfo#FLAG_RETRIEVE_INTERACTIVE_WINDOWS` flag. Otherwise, the search will be performed only in the active window.

Note: If the view with `AccessibilityNodeInfo#FOCUS_INPUT` is on an embedded view hierarchy which is embedded in a `SurfaceView` via `SurfaceView#setChildSurfacePackage`, there is a limitation that this API won't be able to find the node for the view. It's because views don't know about the embedded hierarchies. Instead, you could traverse all the nodes to find the focus.

Parameters
`focus` | `int`: The focus to find. One of `AccessibilityNodeInfo#FOCUS_INPUT` or `AccessibilityNodeInfo#FOCUS_ACCESSIBILITY`.

Returns
`AccessibilityNodeInfo` | The node info of the focused view or null.

See also:

- `AccessibilityNodeInfo.FOCUS_INPUT`
- `AccessibilityNodeInfo.FOCUS_ACCESSIBILITY`

### getAccessibilityButtonController

    public final AccessibilityButtonController getAccessibilityButtonController (int displayId)

Returns the controller of specified logical display for the accessibility button within the system's navigation area. This instance may be used to query the accessibility button's state and register listeners for interactions with and state changes for the accessibility button when `AccessibilityServiceInfo#FLAG_REQUEST_ACCESSIBILITY_BUTTON` is set.

Note: Not all devices are capable of displaying the accessibility button within a navigation area, and as such, use of this class should be considered only as an optional feature or shortcut on supported device implementations.

Parameters
`displayId` | `int`: The logic display id, use `Display#DEFAULT_DISPLAY` for default display.

Returns
`AccessibilityButtonController` | the accessibility button controller for this `AccessibilityService` This value cannot be `null`.

### getAccessibilityButtonController

    public final AccessibilityButtonController getAccessibilityButtonController ()

Returns the controller for the accessibility button within the system's navigation area. This instance may be used to query the accessibility button's state and register listeners for interactions with and state changes for the accessibility button when `AccessibilityServiceInfo#FLAG_REQUEST_ACCESSIBILITY_BUTTON` is set.

Note: Not all devices are capable of displaying the accessibility button within a navigation area, and as such, use of this class should be considered only as an optional feature or shortcut on supported device implementations.

Returns
`AccessibilityButtonController` | the accessibility button controller for this `AccessibilityService` This value cannot be `null`.

### getFingerprintGestureController

    public final FingerprintGestureController getFingerprintGestureController ()

Get the controller for fingerprint gestures. This feature requires `AccessibilityServiceInfo#CAPABILITY_CAN_REQUEST_FINGERPRINT_GESTURES`. Note: The service must be connected before this method is called.
Requires `Manifest.permission.USE_FINGERPRINT`

Returns
`FingerprintGestureController` | The controller for fingerprint gestures, or `null` if gestures are unavailable.

### getMagnificationController

    public final AccessibilityService.MagnificationController getMagnificationController ()

Returns the magnification controller, which may be used to query and modify the state of display magnification.

Note: In order to control magnification, your service must declare the capability by setting the `R.styleable.AccessibilityService_canControlMagnification` property in its meta-data. For more information, see `SERVICE_META_DATA`.

Returns
`AccessibilityService.MagnificationController` | the magnification controller This value cannot be `null`.

### getRootInActiveWindow

    public AccessibilityNodeInfo getRootInActiveWindow ()

Gets the root node in the currently active window if this service can retrieve window content. The active window is the one that the user is currently touching or the window with input focus, if the user is not touching any window. It could be from any logical display.

The currently active window is defined as the window that most recently fired one of the following events: `AccessibilityEvent#TYPE_WINDOW_STATE_CHANGED`, `AccessibilityEvent#TYPE_VIEW_HOVER_ENTER`, `AccessibilityEvent#TYPE_VIEW_HOVER_EXIT`. In other words, the last window shown that also has input focus.

Note: In order to access the root node your service has to declare the capability to retrieve window content by setting the `R.styleable.AccessibilityService_canRetrieveWindowContent` property in its meta-data. For details refer to `SERVICE_META_DATA`.

Returns
`AccessibilityNodeInfo` | The root node if this service can retrieve window content.

### getServiceInfo

    public final AccessibilityServiceInfo getServiceInfo ()

Gets the an `AccessibilityServiceInfo` describing this `AccessibilityService`. This method is useful if one wants to change some of the dynamically configurable properties at runtime.

Returns
`AccessibilityServiceInfo` | The accessibility service info.

See also:

- `AccessibilityServiceInfo`

### getSoftKeyboardController

    public final AccessibilityService.SoftKeyboardController getSoftKeyboardController ()

Returns the soft keyboard controller, which may be used to query and modify the soft keyboard show mode.

Returns
`AccessibilityService.SoftKeyboardController` | the soft keyboard controller This value cannot be `null`.

### getSystemActions

    public final List<AccessibilityNodeInfo.AccessibilityAction> getSystemActions ()

Returns a list of system actions available in the system right now.

System actions that correspond to the global action constants will have matching action IDs. For example, an with id `GLOBAL_ACTION_BACK` will perform the back action.

These actions should be called by `performGlobalAction(int)`.

Returns
`List<AccessibilityNodeInfo.AccessibilityAction>` | A list of available system actions. This value cannot be `null`.

### getSystemService

    public Object getSystemService (String name)

Return the handle to a system-level service by name. The class of the returned object varies by the requested name. Currently available names are:

`WINDOW_SERVICE` ("window")
  The top-level window manager in which you can place custom windows. The returned object is a `WindowManager`. Must only be obtained from a visual context such as Activity or a Context created with `createWindowContext(int, android.os.Bundle)`, which are adjusted to the configuration and visual bounds of an area on screen.
`LAYOUT_INFLATER_SERVICE` ("layout_inflater")
  A `LayoutInflater` for inflating layout resources in this context. Must only be obtained from a visual context such as Activity or a Context created with `createWindowContext(int, android.os.Bundle)`, which are adjusted to the configuration and visual bounds of an area on screen.
`ACTIVITY_SERVICE` ("activity")
  A `ActivityManager` for interacting with the global activity state of the system.
`WALLPAPER_SERVICE` ("wallpaper")
  A `WallpaperService` for accessing wallpapers in this context. Must only be obtained from a visual context such as Activity or a Context created with `createWindowContext(int, android.os.Bundle)`, which are adjusted to the configuration and visual bounds of an area on screen.
`POWER_SERVICE` ("power")
  A `PowerManager` for controlling power management.
`ALARM_SERVICE` ("alarm")
  A `AlarmManager` for receiving intents at the time of your choosing.
`NOTIFICATION_SERVICE` ("notification")
  A `NotificationManager` for informing the user of background events.
`KEYGUARD_SERVICE` ("keyguard")
  A `KeyguardManager` for controlling keyguard.
`LOCATION_SERVICE` ("location")
  A `LocationManager` for controlling location (e.g., GPS) updates.
`SEARCH_SERVICE` ("search")
  A `SearchManager` for handling search.
`VIBRATOR_SERVICE` ("vibrator")
  A `Vibrator` for interacting with the vibrator hardware.
`CONNECTIVITY_SERVICE` ("connectivity")
  A `ConnectivityManager` for handling management of network connections.
`IPSEC_SERVICE` ("ipsec")
  A `IpSecManager` for managing IPSec on sockets and networks.
`WIFI_SERVICE` ("wifi")
  A `WifiManager` for management of Wi-Fi connectivity. On releases before NYC, it should only be obtained from an application context, and not from any other derived context to avoid memory leaks within the calling process.
`WIFI_AWARE_SERVICE` ("wifiaware")
  A `WifiAwareManager` for management of Wi-Fi Aware discovery and connectivity.
`WIFI_P2P_SERVICE` ("wifip2p")
  A `WifiP2pManager` for management of Wi-Fi Direct connectivity.
`INPUT_METHOD_SERVICE` ("input_method")
  An `InputMethodManager` for management of input methods.
`UI_MODE_SERVICE` ("uimode")
  An `UiModeManager` for controlling UI modes.
`DOWNLOAD_SERVICE` ("download")
  A `DownloadManager` for requesting HTTP downloads
`BATTERY_SERVICE` ("batterymanager")
  A `BatteryManager` for managing battery state
`JOB_SCHEDULER_SERVICE` ("taskmanager")
  A `JobScheduler` for managing scheduled tasks
`NETWORK_STATS_SERVICE` ("netstats")
  A `NetworkStatsManager` for querying network usage statistics.
`HARDWARE_PROPERTIES_SERVICE` ("hardware_properties")
  A `HardwarePropertiesManager` for accessing hardware properties.

Note: System services obtained via this API may be closely associated with the Context in which they are obtained from. In general, do not share the service objects between various different contexts (Activities, Applications, Services, Providers, etc.)

Note: Instant apps, for which `PackageManager#isInstantApp()` returns true, don't have access to the following system services: `DEVICE_POLICY_SERVICE`, `FINGERPRINT_SERVICE`, `KEYGUARD_SERVICE`, `SHORTCUT_SERVICE`, `USB_SERVICE`, `WALLPAPER_SERVICE`, `WIFI_P2P_SERVICE`, `WIFI_SERVICE`, `WIFI_AWARE_SERVICE`. For these services this method will return `null`. Generally, if you are running as an instant app you should always check whether the result of this method is `null`.

Note: When implementing this method, keep in mind that new services can be added on newer Android releases, so if you're looking for just the explicit names mentioned above, make sure to return `null` when you don't recognize the name — if you throw a `RuntimeException` exception instead, you're app might break on new Android releases.

Parameters
`name` | `String`: Value is `Context.POWER_SERVICE`, `Context.WINDOW_SERVICE`, `Context.LAYOUT_INFLATER_SERVICE`, `Context.ACCOUNT_SERVICE`, `Context.ACTIVITY_SERVICE`, `Context.ALARM_SERVICE`, `Context.NOTIFICATION_SERVICE`, `Context.ACCESSIBILITY_SERVICE`, `Context.CAPTIONING_SERVICE`, `Context.KEYGUARD_SERVICE`, `Context.LOCATION_SERVICE`, `Context.SEARCH_SERVICE`, `Context.SENSOR_SERVICE`, android.content.Context.SENSOR_PRIVACY_SERVICE, `Context.STORAGE_SERVICE`, `Context.STORAGE_STATS_SERVICE`, `Context.WALLPAPER_SERVICE`, android.content.Context.TIME_ZONE_RULES_MANAGER_SERVICE, `Context.VIBRATOR_SERVICE`, `Context.CONNECTIVITY_SERVICE`, `Context.IPSEC_SERVICE`, `Context.VPN_MANAGEMENT_SERVICE`, android.content.Context.TEST_NETWORK_SERVICE, `Context.NETWORK_STATS_SERVICE`, `Context.WIFI_SERVICE`, `Context.WIFI_AWARE_SERVICE`, `Context.WIFI_P2P_SERVICE`, android.content.Context.WIFI_SCANNING_SERVICE, `Context.WIFI_RTT_RANGING_SERVICE`, `Context.NSD_SERVICE`, `Context.AUDIO_SERVICE`, android.content.Context.AUTH_SERVICE, `Context.FINGERPRINT_SERVICE`, `Context.BIOMETRIC_SERVICE`, `Context.MEDIA_ROUTER_SERVICE`, `Context.TELEPHONY_SERVICE`, `Context.TELEPHONY_SUBSCRIPTION_SERVICE`, `Context.CARRIER_CONFIG_SERVICE`, `Context.EUICC_SERVICE`, `Context.TELECOM_SERVICE`, `Context.CLIPBOARD_SERVICE`, `Context.INPUT_METHOD_SERVICE`, `Context.TEXT_SERVICES_MANAGER_SERVICE`, `Context.TEXT_CLASSIFICATION_SERVICE`, `Context.APPWIDGET_SERVICE`, android.content.Context.ROLLBACK_SERVICE, `Context.DROPBOX_SERVICE`, `Context.DEVICE_POLICY_SERVICE`, `Context.UI_MODE_SERVICE`, `Context.DOWNLOAD_SERVICE`, `Context.NFC_SERVICE`, `Context.BLUETOOTH_SERVICE`, `Context.USB_SERVICE`, `Context.LAUNCHER_APPS_SERVICE`, `Context.INPUT_SERVICE`, `Context.DISPLAY_SERVICE`, `Context.USER_SERVICE`, `Context.RESTRICTIONS_SERVICE`, `Context.APP_OPS_SERVICE`, `Context.ROLE_SERVICE`, `Context.CAMERA_SERVICE`, `Context.PRINT_SERVICE`, `Context.CONSUMER_IR_SERVICE`, `Context.TV_INPUT_SERVICE`, `Context.USAGE_STATS_SERVICE`, `Context.MEDIA_SESSION_SERVICE`, `Context.BATTERY_SERVICE`, `Context.JOB_SCHEDULER_SERVICE`, `Context.MEDIA_PROJECTION_SERVICE`, `Context.MIDI_SERVICE`, android.content.Context.RADIO_SERVICE, `Context.HARDWARE_PROPERTIES_SERVICE`, `Context.SHORTCUT_SERVICE`, `Context.SYSTEM_HEALTH_SERVICE`, `Context.COMPANION_DEVICE_SERVICE`, `Context.CROSS_PROFILE_APPS_SERVICE`, android.content.Context.PERMISSION_SERVICE, or android.content.Context.LIGHTS_SERVICE This value cannot be `null`.

Returns
`Object` | The service or `null` if the name does not exist.

### getWindows

    public List<AccessibilityWindowInfo> getWindows ()

Gets the windows on the screen of the default display. This method returns only the windows that a sighted user can interact with, as opposed to all windows. For example, if there is a modal dialog shown and the user cannot touch anything behind it, then only the modal window will be reported (assuming it is the top one). For convenience the returned windows are ordered in a descending layer order, which is the windows that are on top are reported first. Since the user can always interact with the window that has input focus by typing, the focused window is always returned (even if covered by a modal window).

Note: In order to access the windows your service has to declare the capability to retrieve window content by setting the `R.styleable.AccessibilityService_canRetrieveWindowContent` property in its meta-data. For details refer to `SERVICE_META_DATA`. Also the service has to opt-in to retrieve the interactive windows by setting the `AccessibilityServiceInfo#FLAG_RETRIEVE_INTERACTIVE_WINDOWS` flag.

Returns
`List<AccessibilityWindowInfo>` | The windows if there are windows and the service is can retrieve them, otherwise an empty list.

### getWindowsOnAllDisplays

    public final SparseArray<List<AccessibilityWindowInfo>> getWindowsOnAllDisplays ()

Gets the windows on the screen of all displays. This method returns only the windows that a sighted user can interact with, as opposed to all windows. For example, if there is a modal dialog shown and the user cannot touch anything behind it, then only the modal window will be reported (assuming it is the top one). For convenience the returned windows are ordered in a descending layer order, which is the windows that are on top are reported first. Since the user can always interact with the window that has input focus by typing, the focused window is always returned (even if covered by a modal window).

Note: In order to access the windows your service has to declare the capability to retrieve window content by setting the `R.styleable.AccessibilityService_canRetrieveWindowContent` property in its meta-data. For details refer to `SERVICE_META_DATA`. Also the service has to opt-in to retrieve the interactive windows by setting the `AccessibilityServiceInfo#FLAG_RETRIEVE_INTERACTIVE_WINDOWS` flag.

Returns
`SparseArray<List<AccessibilityWindowInfo>>` | The windows of all displays if there are windows and the service is can retrieve them, otherwise an empty list. The key of SparseArray is display ID. This value cannot be `null`.

### onAccessibilityEvent

    public abstract void onAccessibilityEvent (AccessibilityEvent event)

Callback for `AccessibilityEvent`s.

Parameters
`event` | `AccessibilityEvent`: The new event. This event is owned by the caller and cannot be used after this method returns. Services wishing to use the event after this method returns should make a copy.

### onBind

    public final IBinder onBind (Intent intent)

Implement to return the implementation of the internal accessibility service interface.

Parameters
`intent` | `Intent`: The Intent that was used to bind to this service, as given to `Context.bindService`. Note that any extras that were included with the Intent at that point will not be seen here.

Returns
`IBinder` | Return an IBinder through which clients can call on to the service.

### onGesture

    public boolean onGesture (AccessibilityGestureEvent gestureEvent)

Called by the system when the user performs a specific gesture on the specific touch screen.

Note: To receive gestures an accessibility service must request that the device is in touch exploration mode by setting the `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` flag.

Note: The default implementation calls `onGesture(int)` when the touch screen is default display.

Parameters
`gestureEvent` | `AccessibilityGestureEvent`: The information of gesture. This value cannot be `null`.

Returns
`boolean` | Whether the gesture was handled.

### onInterrupt

    public abstract void onInterrupt ()

Callback for interrupting the accessibility feedback.

### onSystemActionsChanged

    public void onSystemActionsChanged ()

This is called when the system action list is changed.

### performGlobalAction

    public final boolean performGlobalAction (int action)

Performs a global action. Such an action can be performed at any moment regardless of the current application or user location in that application. For example going back, going home, opening recents, etc.

Parameters
`action` | `int`: The action to perform.

Returns
`boolean` | Whether the action was successfully performed.

See also:

- `GLOBAL_ACTION_BACK`
- `GLOBAL_ACTION_HOME`
- `GLOBAL_ACTION_NOTIFICATIONS`
- `GLOBAL_ACTION_RECENTS`

### setGestureDetectionPassthroughRegion

    public void setGestureDetectionPassthroughRegion (int displayId,
                    Region region)

When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is enabled, this function requests that touch interactions starting in the specified region of the screen bypass the gesture detector. There can only be one gesture detection passthrough region per display. Requesting a new gesture detection passthrough region clears the existing one. To disable this passthrough and return to the original behavior, pass in an empty region. When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is disabled this function has no effect.

Parameters
`displayId` | `int`: The display on which to set this region.
`region` | `Region`: the region of the screen. This value cannot be `null`.

### setServiceInfo

    public final void setServiceInfo (AccessibilityServiceInfo info)

Sets the `AccessibilityServiceInfo` that describes this service.

Note: You can call this method any time but the info will be picked up after the system has bound to this service and when this method is called thereafter.

Parameters
`info` | `AccessibilityServiceInfo`: The info.

### setTouchExplorationPassthroughRegion

    public void setTouchExplorationPassthroughRegion (int displayId,
                    Region region)

When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is enabled, this function requests that touch interactions starting in the specified region of the screen bypass the touch explorer and go straight to the view hierarchy. There can only be one touch exploration passthrough region per display. Requesting a new touch explorationpassthrough region clears the existing one. To disable this passthrough and return to the original behavior, pass in an empty region. When `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` is disabled this function has no effect.

Parameters
`displayId` | `int`: The display on which to set this region.
`region` | `Region`: the region of the screen . This value cannot be `null`.

### takeScreenshot

    public void takeScreenshot (int displayId,
                    Executor executor,
                    AccessibilityService.TakeScreenshotCallback callback)

Takes a screenshot of the specified display and returns it via an `AccessibilityService.ScreenshotResult`. You can use `Bitmap#wrapHardwareBuffer` to construct the bitmap from the ScreenshotResult's payload.

Note: In order to take screenshot your service has to declare the capability to take screenshot by setting the `R.styleable.AccessibilityService_canTakeScreenshot` property in its meta-data. For details refer to `SERVICE_META_DATA`.

Parameters
`displayId` | `int`: The logic display id, must be `Display#DEFAULT_DISPLAY` for default display.
`executor` | `Executor`: Executor on which to run the callback. This value cannot be `null`. Callback and listener events are dispatched through this `Executor`, providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use `Context.getMainExecutor()`. To dispatch events through a shared thread pool, you can use `AsyncTask#THREAD_POOL_EXECUTOR`.
`callback` | `AccessibilityService.TakeScreenshotCallback`: The callback invoked when taking screenshot has succeeded or failed. See `TakeScreenshotCallback` for details. This value cannot be `null`.

## Protected methods

### onGesture

    protected boolean onGesture (int gestureId)

This method is deprecated.
Override `onGesture(android.accessibilityservice.AccessibilityGestureEvent)` instead.

Called by `onGesture(android.accessibilityservice.AccessibilityGestureEvent)` when the user performs a specific gesture on the default display. Note: To receive gestures an accessibility service must request that the device is in touch exploration mode by setting the `AccessibilityServiceInfo#FLAG_REQUEST_TOUCH_EXPLORATION_MODE` flag.

Parameters
`gestureId` | `int`: The unique id of the performed gesture.

Returns
`boolean` | Whether the gesture was handled.

See also:

- `GESTURE_SWIPE_UP`
- `GESTURE_SWIPE_UP_AND_LEFT`
- `GESTURE_SWIPE_UP_AND_DOWN`
- `GESTURE_SWIPE_UP_AND_RIGHT`
- `GESTURE_SWIPE_DOWN`
- `GESTURE_SWIPE_DOWN_AND_LEFT`
- `GESTURE_SWIPE_DOWN_AND_UP`
- `GESTURE_SWIPE_DOWN_AND_RIGHT`
- `GESTURE_SWIPE_LEFT`
- `GESTURE_SWIPE_LEFT_AND_UP`
- `GESTURE_SWIPE_LEFT_AND_RIGHT`
- `GESTURE_SWIPE_LEFT_AND_DOWN`
- `GESTURE_SWIPE_RIGHT`
- `GESTURE_SWIPE_RIGHT_AND_UP`
- `GESTURE_SWIPE_RIGHT_AND_LEFT`
- `GESTURE_SWIPE_RIGHT_AND_DOWN`

### onKeyEvent

    protected boolean onKeyEvent (KeyEvent event)

Callback that allows an accessibility service to observe the key events before they are passed to the rest of the system. This means that the events are first delivered here before they are passed to the device policy, the input method, or applications.

Note: It is important that key events are handled in such a way that the event stream that would be passed to the rest of the system is well-formed. For example, handling the down event but not the up event and vice versa would generate an inconsistent event stream.

Note: The key events delivered in this method are copies and modifying them will have no effect on the events that will be passed to the system. This method is intended to perform purely filtering functionality.

Parameters
`event` | `KeyEvent`: The event to be processed. This event is owned by the caller and cannot be used after this method returns. Services wishing to use the event after this method returns should make a copy.

Returns
`boolean` | If true then the event will be consumed and not delivered to applications, otherwise it will be delivered as usual.

### onServiceConnected

    protected void onServiceConnected ()

This method is a part of the `AccessibilityService` lifecycle and is called after the system has successfully bound to the service. If is convenient to use this method for setting the `AccessibilityServiceInfo`.

See also:

- `AccessibilityServiceInfo`
- `setServiceInfo(AccessibilityServiceInfo)`

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